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Old 02-23-2013, 05:05 PM #1
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Default gold anodized heatsinks

i have a few gold plated/anodized? copper heatsinks i got from the gb a while back. for maximum heat movement should i remove the "gold" from the inside? i doubt it's real gold and that's why i ask.


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i have fond memories of owning
10 hene tubes 2 argon ion units and lots of diode and dpss lasers in these wavelengths:
405,445,450,458,473,488,532,543,594,612,632,635,650,685,780
I'm rebuilding my collection:
Skyray 405 12x
kryton groove gitd 445
B&W Tek 473 lab laser
JDSU 2214-40 multiline argon ion
Osram pl520 in an sh-032 host
Skylaser HL532-300
543 HeNe
632 HeNe x3
Opnext 638 single mode in c6 host
Rayfoss 650 150mW
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Old 02-23-2013, 05:24 PM #2
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Default Re: gold anodized heatsinks

Quote:
Originally Posted by cheech226 View Post
i have a few gold plated/anodized? copper heatsinks i got from the gb a while back. for maximum heat movement should i remove the "gold" from the inside? i doubt it's real gold and that's why i ask.
What were they coated with, to begin with? If it's a titanium coating, it may conduct heat better than the copper within. In which case, keep it simple and leave it there. How nicely does the module fit in there, now? Because removing the coating will enlarge the hole, albeit ever so slightly.
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Old 02-23-2013, 06:17 PM #3
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Default Re: gold anodized heatsinks

i thought Ti was a poor heat conductor
i'm not really sure what the coating is. i hope someone else who bought these from anthot's gb will chime in soon. as i remember they were sold as gold plated, but that may have just referred to the color. at the time it wasn't important as the price was good.
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i have fond memories of owning
10 hene tubes 2 argon ion units and lots of diode and dpss lasers in these wavelengths:
405,445,450,458,473,488,532,543,594,612,632,635,650,685,780
I'm rebuilding my collection:
Skyray 405 12x
kryton groove gitd 445
B&W Tek 473 lab laser
JDSU 2214-40 multiline argon ion
Osram pl520 in an sh-032 host
Skylaser HL532-300
543 HeNe
632 HeNe x3
Opnext 638 single mode in c6 host
Rayfoss 650 150mW
Laserbee II Deluxe lpm w/ Peregrine
Laissez les bons temps rouler!

Last edited by cheech226; 02-23-2013 at 06:21 PM.
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Old 02-23-2013, 07:20 PM #4
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Default Re: gold anodized heatsinks

Ti isnt as good as copper!

The HS' from the GB were plated with real gold, but it is only a microscopic layer and so not very expensive. It was just to help prevent the copper from oxidising or tarnishing. Gold is actually a very good metal for thermal transfer, so I definitely wouldn't remove it! By removing it you'll also theoretically be increasing the inner diameter of the module hole, which you'll end up having to fill with thermal compound. Given the very low thermal conductivity of even arctic silver, it would be a futile exercise!

Edit: Gold is 318 Wm-1K-1, so just below copper at 400 and much better than Al at around 200! Ti is only around 25 and Arctic Silver only 7.5 Wm-1K-1
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100mW 405 PHR
700mW 405

2W 445 C6--link--
+2.3W 445 --link--
+2.5W 445 --link--

190mW 450 --link--
15mW 510nm
5mW 532 --link--
25mW 532 --link--

520mW 638 --link--
1W 638

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Last edited by grainde; 02-23-2013 at 07:31 PM.
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Old 02-23-2013, 07:58 PM #5
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Default Re: gold anodized heatsinks

thanks grainde! that's what i wanted to hear. i never would have thought of removing it if i knew it was gold. i thought it could have been some gold colored non heat conductive coating.
__________________
i have fond memories of owning
10 hene tubes 2 argon ion units and lots of diode and dpss lasers in these wavelengths:
405,445,450,458,473,488,532,543,594,612,632,635,650,685,780
I'm rebuilding my collection:
Skyray 405 12x
kryton groove gitd 445
B&W Tek 473 lab laser
JDSU 2214-40 multiline argon ion
Osram pl520 in an sh-032 host
Skylaser HL532-300
543 HeNe
632 HeNe x3
Opnext 638 single mode in c6 host
Rayfoss 650 150mW
Laserbee II Deluxe lpm w/ Peregrine
Laissez les bons temps rouler!
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Old 02-23-2013, 08:08 PM #6
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Default Re: gold anodized heatsinks

Quote:
Originally Posted by cheech226 View Post
thanks grainde! that's what i wanted to hear. i never would have thought of removing it if i knew it was gold. i thought it could have been some gold colored non heat conductive coating.
No worries. So what are you planning to build?
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Here is my old Kryton Groove FS thread!

100mW 405 PHR
700mW 405

2W 445 C6--link--
+2.3W 445 --link--
+2.5W 445 --link--

190mW 450 --link--
15mW 510nm
5mW 532 --link--
25mW 532 --link--

520mW 638 --link--
1W 638

250mW 650
250mW 780

3000 Lm C8 MTG2 @ 6 A!
Poppas mod 3A --link--
Sipik 98 Cu pill/star mod --link--
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Old 02-23-2013, 08:38 PM #7
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Default Re: gold anodized heatsinks

i want to make 2x c6 loc's and a 445 in an aurora. mrcrouse tapped out the holes and installed set screws in the sinks i had from the gb.
__________________
i have fond memories of owning
10 hene tubes 2 argon ion units and lots of diode and dpss lasers in these wavelengths:
405,445,450,458,473,488,532,543,594,612,632,635,650,685,780
I'm rebuilding my collection:
Skyray 405 12x
kryton groove gitd 445
B&W Tek 473 lab laser
JDSU 2214-40 multiline argon ion
Osram pl520 in an sh-032 host
Skylaser HL532-300
543 HeNe
632 HeNe x3
Opnext 638 single mode in c6 host
Rayfoss 650 150mW
Laserbee II Deluxe lpm w/ Peregrine
Laissez les bons temps rouler!
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Old 02-23-2013, 08:53 PM #8
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Default Re: gold anodized heatsinks

Ok cool. I just built a c6 with an AMC driver @ 380 mA and one of Lazeerers 3.8 mm red diodes. Set the modes to low, med and high at 13, 80 and 250 mA respectively (no strobe or sos)...love the modes of the AMC drivers!

Anyway, with those HS' you can really push the diodes in your C6's... Good luck!
__________________
New to lasers & want some info on how to build a laser? Look here: Build a laser

Need info on goggles? Look here: Get safety goggles now!

FS Custom Sinner Host builds available now!


Here is my old Kryton Groove FS thread!

100mW 405 PHR
700mW 405

2W 445 C6--link--
+2.3W 445 --link--
+2.5W 445 --link--

190mW 450 --link--
15mW 510nm
5mW 532 --link--
25mW 532 --link--

520mW 638 --link--
1W 638

250mW 650
250mW 780

3000 Lm C8 MTG2 @ 6 A!
Poppas mod 3A --link--
Sipik 98 Cu pill/star mod --link--
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